def _make_bilinear_weights(self, size, num_channels): factor = (size + 1) // 2 # 向下取整 if size % 2 == 1: center = factor - 1 else: center = factor - 0.5 og = np.ogrid[:size, :size] # 建立网格? filt = (1 - abs(og[0] - center) / factor) * (1 - abs(og[1] - center) / factor) filt = torch.from_numpy(filt) w = torch.zeros(num_channels, num_channels, size, size) w.requires_grad = False for i in range(num_channels): for j in range(num_channels): if i == j: w[i, j] = filt return w
时间: 2023-05-28 19:04:52 浏览: 200
shrink_zoom_bilinear.zip_bilinear shrink_zoom
这段代码用于生成双线性插值的权重矩阵,其中size是插值的尺寸(通常为2或3),num_channels是输入图像的通道数。factor是计算出来的一个系数,用于计算权重矩阵的每个元素的值。具体的计算方法可以参考双线性插值的算法原理。
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